# Why Do Some Months Have 31 30 29 Or 28 Days?

## Why does a month have 30 or 31 days?

If it takes the Moon 28 or 29 days to orbit the earth why are most months 30 or 31 days long.

This has resulted from a compromise.

Initially, months were mostly 29 days long and the average length of a month was 29.5 days which is the time taken by the Moon to orbit the Earth..

## What are the 7 months with 31 days?

Months that have 31 days are: January, March, May, July, August, October, December.

## What is the month of January famous for?

The month of January is named after the Roman god of doors, Janus, because this month is the door into the new year. Janus is also called the two-faced god. He represents all beginnings and possesses the ability to see the past and the future.

## Why is a Week 7 Days long?

The Babylonians, who lived in modern-day Iraq, were astute observers and interpreters of the heavens, and it is largely thanks to them that our weeks are seven days long. The reason they adopted the number seven was that they observed seven celestial bodies — the sun, the moon, Mercury, Venus, Mars, Jupiter and Saturn.

## Why is Feb the shortest month?

There’s a rumour that the reason why February is the shortest month of the year is because another king named Augustus Caesar stole a day from February to add to the month named after him — August. However, the real reason February is shorter begins with the fact that the first calendar was only 10 months long.

## Why does FEB have 28 days?

This is because of simple mathematical fact: the sum of any even amount (12 months) of odd numbers will always equal an even number—and he wanted the total to be odd. So Numa chose February, a month that would be host to Roman rituals honoring the dead, as the unlucky month to consist of 28 days.

## Why does February only have 28 days as opposed to 30 or 31?

Because Romans believed even numbers to be unlucky, each month had an odd number of days, which alternated between 29 and 31. But, in order to reach 355 days, one month had to be an even number. February was chosen to be the unlucky month with 28 days.

## Why does January have 31 days?

Julius Caesar’s astronomers explained the need for 12 months in a year and the addition of a leap year to synchronize with the seasons. … These months were both given 31 days to reflect their importance, having been named after Roman leaders.

## How do leap year babies age legally?

If you were born on Leap Day 1920, you would be 100 years old, or 25 in Leap Day years. The year must be evenly divisible by 4. If the year can be evenly divided by 100, it is not a leap year unless the year is also evenly divisible by 400, according to mathisfun.com.

## Does February ever have 27 days?

February shall never have 27 days. … February was chosen to be the unlucky month with 28 days. One may also ask, does February ever have 30 days? February 30 or 30 February is a date that does not occur on the Gregorian calendar, where the month of February contains only 28 days, or 29 days in a leap year.

## Is 27 days a month?

The sidereal month is defined as the Moon’s orbital period in a non-rotating frame of reference (which on average is equal to its rotation period in the same frame). It is about 27.32166 days (27 days, 7 hours, 43 minutes, 11.6 seconds). … An anomalistic month is about 27.55455 days on average.

## What if someone is born on Feb 29?

Leap year day on February 29 occurs nearly every four years. However, leap day babies, (leaplings, leapers, or leapsters) still get to celebrate their birthday in common years. Some celebrate on February 28, some prefer March 1.